body,
html,
svg {
  width: 100%;
  height: 100%;
  background: #000;
  overflow: hidden;
}
h1 {
  position: absolute;
  top: 40%;
  left: 0;
  margin: auto;
  width: 100%;
  text-align: center;
  color: hotpink;
  font-family: 楷体;
  font-size: 50px;
}
